Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Jnana-Karma-Sanyasa Yoga Chapter 4, Verse 4.20.
Sanskrit
त्यक्त्वा कर्मफलासङ्गं नित्यतृप्तो निराश्रयः । कर्मण्यभिप्रवृत्तोऽपि नैव किंचित्करोति सः ॥ ४.२० ॥
Hindi
जो पुरुष समस्त कर्मोंमें और उनके फलमें आसक्तिका सर्वथा त्याग करके संसारके आश्रय रहित हो गया है और परमात्मामें नित्य तृप्त है, वह कर्मोंमें भलीभाँति बर्तता हुआ भी वास्तवमें कुछ भी नहीं करता|
English
The Lord proclaimed: He who is totally unattached to the rewards of action, is forever happy and satisfied, who depends on nobody in this world, and is constantly involved in action, is really performing no action at all.